So far, we know Kate been sent kiddy learning programs from MyTalkingToddler.com ... morning sickness relief from a company called One Step Ahead ... and clothes and products from 2 high end L.A. baby boutiques.

We spoke to a rep for Bel Bambini in Beverly Hills ... who told us they sent Kate a $2,300 gift basket which included a new Bugaboo Cameleon 3 stroller (worth $978), a Fendi layette set ($265), Dior Booties ($275) and much much more.

Kate also got more than $1,000 in free baby swag from Flicka -- a high-end baby store owned by "General Hospital" star John Reilly. Management tells us they shipped over their "hot selling Choo Choo blankies" which have been worn by a whole bunch of celeb babies.

Guess Kate can cancel the baby shower ... unless Queen Elizabeth's just DYING to play "Guess the Due Date."